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<p>Antibiotics are among pollutants detected in aquatic environments including effluents of wastewater treatment plants, surface and groundwater and also drinking water. Long term exposure to these compounds pose a threat not only to the health of human but also for aquatic organisms. In this work the removal of amoxicillin from aqueous environments using O<sub>3</sub> and O<sub>3</sub>/H<sub>2</sub>O<sub>2</sub> was investigated on lab scale and kinetic studies along with cost analysis was conducted. Operational parameters including pH, amoxicillin concentration, reaction time and applied O<sub>3</sub> concentration in gas phase were systematically varied to determine optimal conditions. Results indicate favorable amoxicillin apparent removal efficacy under optimal conditions: a reaction time of 30 minutes, pH of 10, amoxicillin concentration of 50 ppm, and gas phase O<sub>3</sub> concentration of 833.3 mg/L, yielding an 89% apparent removal efficiency alongside reductions of 21.93% in COD and 43.03% in TOC during ozonation. Additionally, the O<sub>3</sub>/H<sub>2</sub>O<sub>2</sub> process was explored to enhance antibiotic removal efficiency. The H<sub>2</sub>O<sub>2</sub> dose used was 0-0.3 g/L and maximum apparent removal efficiency of approximately 97% for amoxicillin with H<sub>2</sub>O<sub>2</sub> volume of 4 mL (0.2 g/L) was achieved under optimal conditions of ozonation. Application of tert-butanol as radical scavenger confirmed the vital role of hydroxyl radicals in amoxicillin decomposition. Kinetic analysis revealed that both processes adhere to first-order kinetics. A cost analysis for these processes was performed to give an insight into the costs associated with these processes in large scale.</p>

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Ozone based advanced oxidation for antibiotic amoxicillin removal from aqueous environment with kinetic and economic evaluation

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月14日

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  • Mohammad Mehdi Malek Mohammadi,
  • Naeimeh Jodeiri,
  • Hamed Bakhshi,
  • Davood Kahforoushan

摘要

Antibiotics are among pollutants detected in aquatic environments including effluents of wastewater treatment plants, surface and groundwater and also drinking water. Long term exposure to these compounds pose a threat not only to the health of human but also for aquatic organisms. In this work the removal of amoxicillin from aqueous environments using O3 and O3/H2O2 was investigated on lab scale and kinetic studies along with cost analysis was conducted. Operational parameters including pH, amoxicillin concentration, reaction time and applied O3 concentration in gas phase were systematically varied to determine optimal conditions. Results indicate favorable amoxicillin apparent removal efficacy under optimal conditions: a reaction time of 30 minutes, pH of 10, amoxicillin concentration of 50 ppm, and gas phase O3 concentration of 833.3 mg/L, yielding an 89% apparent removal efficiency alongside reductions of 21.93% in COD and 43.03% in TOC during ozonation. Additionally, the O3/H2O2 process was explored to enhance antibiotic removal efficiency. The H2O2 dose used was 0-0.3 g/L and maximum apparent removal efficiency of approximately 97% for amoxicillin with H2O2 volume of 4 mL (0.2 g/L) was achieved under optimal conditions of ozonation. Application of tert-butanol as radical scavenger confirmed the vital role of hydroxyl radicals in amoxicillin decomposition. Kinetic analysis revealed that both processes adhere to first-order kinetics. A cost analysis for these processes was performed to give an insight into the costs associated with these processes in large scale.